ploz help
 

hi friends i got iphone 3gs its model is MC150C with firmware 4.2.1 and bb 6.15.00........ i got it in jailbrake condition but not unlocked
i unlock it with ultrasn0w through cydia

before unlock there was no problem when i restart it..but after unlock when i restart it stuck on apple logo but no loading bar.....
with redsn0w just boot tetherd option it works but i need real solution

plz help me or suggest me what should i do


br
khm050